kubernetes - 为什么 istio-ingressgateway 会暴露端口 31400？

Question

Istio 入口网关默认公开以下端口:

80:31380/TCP,443:31390/TCP,31400:31400/TCP

为什么它暴露31400并将其映射到31400？我在文档或其他地方找不到对此的解释。

背景:我正在关注 Install with Helm via helm template 使用 Istio 0.8.0 的指南。部署 list 是从 https://github.com/istio/istio/tree/0.8.0/install/kubernetes/helm/istio 构建的，给出以下入口网关服务定义:

# Source: istio/charts/ingressgateway/templates/service.yaml
apiVersion: v1
kind: Service
metadata:
  name: istio-ingressgateway
  namespace: istio-system    
  labels:
    chart: ingressgateway-0.8.0
    release: istio
    heritage: Tiller
    istio: ingressgateway
spec:
  type: NodePort
  selector:
    istio: ingressgateway
  ports:
    -
      name: http
      nodePort: 31380
      port: 80
    -
      name: https
      nodePort: 31390
      port: 443
    -
      name: tcp
      nodePort: 31400
      port: 31400

Answer 1

Commit a4b6cc5提到:

Adding the 31400 port back because of testdata dependency

这是 istio/istio PR 6350 的一部分

These changes add support for multiple ingress/egress gateway configuration in the Helm charts.
The new gateways field is an array that by default has one configuration (as it was before) but allows users to add more configurations to have multiple ingress/egress gateways deployed when installing the charts.

见 commit 05cba4e .